var clear="App_Themes/Default/Images/Graphics/clear.gif" //path to clear.gif

pngfix = function() {
    var els = document.getElementsByTagName('*'); var ip = /\.png/i; var i = els.length; while (i-- > 0) {
    var el = els[i]; var es = el.style; if (el.src && el.src.match(ip) && !es.filter) {
    es.height = el.height; es.width = el.width; es.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + el.src + "',sizingMethod='crop')"; el.src = "App_Themes/Default/Images/Graphics/clear.gif"; 
        }
else{var elb=el.currentStyle.backgroundImage;if(elb.match(ip)){var path=elb.split('"');var rep=(el.currentStyle.backgroundRepeat=='no-repeat')?'crop':'scale';es.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+path[1]+"',sizingMethod='"+rep+"')";es.height=el.clientHeight+'px';es.backgroundImage='none';var elkids=el.getElementsByTagName('*');if (elkids){var j=elkids.length;if(el.currentStyle.position!="absolute")es.position='static';while (j-- >0)if(!elkids[j].style.position)elkids[j].style.position="relative";}}}}}
if (window.addEventListener) {
    window.addEventListener('onload', pngfix, false);
}
else {
    if (window.attachEvent) {
        ('onload', pngfix);
    }
}